<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class AddToRolesTable extends Migration {
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up() {
        if (Schema::hasTable('roles')) {
            Schema::table('roles', function (Blueprint $table) {
                $table->string('description')->default("")->comment('标题');
            });
        }
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down() {
        Schema::table('roles', function (Blueprint $table) {
            //
        });
    }
}
